williams



. (No Model.) I 38heets-Sheet 1.

H; WILLIAMS.

GAS MOTOR ENGINE. No. 457,020. Patented Aug. 4, 1891.

wiiness'es; l hvefitv,

W M Afl'ovmgyg,

w: NORRIS Pncas 00., Moro-Lima, WASNINOTON, a c

3 Sheets-Sheet 2.

- (No Model.)

H. WILLIAM$.

GAS MOTOR ENGINE.

No. 457.020. Patented Aug. 4, 1891.

I'M. m i w lllillllll IKE 671 Z OT.

AzLo rne a 3 Sheets-Sheet 3.

(No Model.)

H. WILLIAMS.

GAS MOTOR ENGINE. No. 457,020. Patented Aug. 4, 189.1.

FIC.4.

UNITED STATES PATENT OFFICE.

HUGH IVILLIAMS, OF STOUKPORT, ENGLAND.

GAS-MOTOR ENGINE.

SPECIFICATION forming part of Letters Patent No. 457,020, dated August 4, 1891. Application filed August 1, 1889. Serial No. 319,458. (No mode1.)- Patented in England March 5, 1889, No. 3,820.

To all whom it mayconoern:

Be it known that I, HUGH WILLIAMS, a subject of the Queen of Great Britain, and a resident of Stockport, in the county of Chester, England, have invented certain new and useful Improvements in Gas-Motor Engines, (for which I have obtained a patent in Great Britain, No. 3,820, bearing date March 5, 1889,) of which the following is a specification.

My invention relates to improvements in gas-motor engines, and is particularly applicable to the type of engines known as the Stockport gas-engines, for which Letters Patent of the United States No. 301,078,bearing date July 1, 1884, were granted to Charles Henry Andrew, and in which the cylinders are arranged tandem at opposite sides of the crank-shaft, the chief object of my improvements being to insure the delivery of full charges of explosive fluid mixture from the compression or charging cylinders into the power-cylinders. I attain this object by the arrangement and combination of parts illustrated by the accompanying three sheets of drawings, in which- Figure 1 is a longitudinal vertical section of a double-acting Stockport gas-engine fit ted with my improvement. Fig. 2 is a plan of the same, partly in section. Fig. 3 is a sectional plan of the compressionrcylinders and their pistons. Fig. 4 is a transverse vertical section taken through the middle of the engine.

Similarletters refer to similar parts throughout the several views.

The two power-cylinders a a are placed on opposite sides of the crank-shaft b, on which is mounted the driving-pulley b and the flywheel b The two power-pistons c e have the ends of their respective piston-rods cl (1 fitted together to form a cross-head, through which the crank-pin 1) passes.

Now according to my present improvements I cast with the end of the piston-rod d, or otherwise form on the aforesaid crosshead, a projection d which carries a stud e,

which constitutes a crank-pin for a connecting-rod f, the other end of which is secured by a pin g to the piston-rod h of the piston t' of the compression or charging cylinder j.

The piston-rod h of the piston z" of the other compression-cylinder j is screwed into the end of the piston-rod h and secured by nuts 71 This mode of connection permitsthe adjustment of the relative positions of the two pistons t 'i' and also insures their simultaneous movement.

The engine is provided with the usual ports, passages, valves, and igniting arrangements, which may be of any of the ordinary wellknown constructions. The great advantage obtained by driving the piston t of the compression-cylinderj from the separate and independent crank-pin e, as above described, is that a longer or later stroke is given to it and also to the piston z" of the other compressioncylinderj than that of their corresponding power-pistons d d. Consequently after each power-piston has completed its instroke the compression-piston below it will still continue to move inward for a short distance, and the effect of this continued movement is to drive a full charge of explosive fluid mixture into the opposite power-cylinder. During the time this compressionpiston -say, for example, the piston 2'is forcing its charge from the cylinderj into the power-cylinder a the opposite compression-cylinder will be drawing in a new charge of explosive fluid mixture, as is well understood.

I declare that what I claim, and desire to secure by Letters Patent of the United States, 15-

The combination, with the power-cylinders a a, their pistons c o, piston-rods d d, and the crank-shaft b, of the projection d crankpin e, carried by said projection, rod f, conmeeting said crank-pin e to the piston-rod h of the compression-piston 1', said piston-rod It being coupled acljustably to the piston-rod h of the compression-piston 'i, all substantially as herein shown and described, for the pur' pose specified.

In witness whereof I have hereunto set my hand in presence of two witnesses.

HUGH WILLIAMS. Witnesses:

ALF. R. BELLAMY, ROBERT I. SMITH. 

